<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <title>Script Tag using Eval</title>
</head>
<body>

<script>

    eval("x=10;y=20;document.body.insertAdjacentHTML('beforeend', x*y)");
    document.body.insertAdjacentHTML("beforeend", "&lt;br/&gt;" + eval("2+2"));
    document.body.insertAdjacentHTML("beforeend", "&lt;br/&gt;" + eval(x + 17));

</script>

</body>
</html>